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Automating Manufacturing Systems - Process Control and ...

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continuous actuators - 24.22<br />

The XXXXXXX<br />

e f = r a i a + Dl a i a + e m<br />

e m<br />

T<br />

=<br />

=<br />

K e θD<br />

K T i a<br />

e a = ( r a + l a D)i a + K e Dθ<br />

e a<br />

= ( r a<br />

+ l a<br />

D)<br />

⎛-----<br />

T ⎞<br />

⎝ ⎠<br />

+ K e<br />

Dθ<br />

K T<br />

Figure 24.19<br />

Equations for an armature controlled DC motor<br />

• Compound motors\<br />

- have the rotor <strong>and</strong> stator coils connected in series.<br />

- differential compound motors have the shunt <strong>and</strong> series winding field<br />

aligned so that they oppose each other.<br />

- cumulative compound motors have the shunt <strong>and</strong> series winding fields<br />

aligned so that they add<br />

ω<br />

cumulative<br />

differential<br />

T<br />

www.PA<strong>Control</strong>.com

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